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NX is produced by the following step of reactions:
P
\[
\begin{array}{l}
\mathrm{M}+\mathrm{X}_{2} \longrightarrow \mathrm{MX}_{2} \\
3 \mathrm{MX}_{2}+\mathrm{X}_{2} \longrightarrow \mathrm{M}_{3} \mathrm{X}_{8} \\
\mathrm{M}_{3} \mathrm{X}_{8}+ \mathrm{N}_{2} \mathrm{CO}_{3} \longrightarrow \mathrm{NX}+\mathrm{CO}_{2}+\mathrm{M}_{3} \mathrm{O}_{4}
\end{array}
\]
W
How much \( \mathrm{M} \) (metal) is consumed to produces 206 gm of NX? (Take at. Wt. of \( \mathrm{M}=56, \mathrm{~N}=23 \), \( \mathrm{X}=80) \)
(A) \( 42 \mathrm{gm} \)
(B) \( 56 \mathrm{gm} \)
(C) 14/3 gm
(D) 7/4 gm
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